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Leases (Tables) | 6 Months Ended
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Jun. 30, 2020
Leases |
Summary of total lease cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended | ​ | For the Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2020 | ​ | 2019 |  | 2020 | ​ | 2019
Operating lease cost | ​ | $ | 83,461 | ​ | $ | 80,091 | ​ | $ | 166,656 | ​ | $ | 158,905
Short-term operating lease cost | ​ |  | 941 | ​ |  | 1,546 | ​ |  | 2,725 | ​ |  | 3,604
Variable operating lease cost | ​ |  | 20,776 | ​ |  | 18,885 | ​ |  | 41,109 | ​ |  | 37,263
Sublease income | ​ |  | (1,187) | ​ |  | (976) | ​ |  | (2,362) | ​ |  | (1,933)
Total lease cost | ​ | $ | 103,991 | ​ | $ | 99,546 | ​ | $ | 208,128 | ​ | $ | 197,839
Other lease related information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Six Months Ended
​ | ​ | June 30,
​ | ​ | 2020 | ​ | 2019
Cash paid for amounts included in the measurement of operating lease liabilities: |  | ​ |  | ​ | ​ | ​
Operating cash flows from operating leases | ​ | $ | 165,665 | ​ | $ | 157,372
Right-of-use assets obtained in exchange for new operating lease liabilities | ​ | ​ | 125,160 | ​ | ​ | 79,018

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- Definition Tabular disclosure of other lease information for lessee's operating leases. + References No definition available. + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- References No definition available. + Details
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